C. G. Dilibe, M. Shittu, and E. U. Ogbodo. “A Functional Approach to Determining the Optimum Filter Order in Stability of Filtered Electrocardiographic (ECG) Signals”. Research & Review: Electronics and Communication Engineering, Apr. 2025, pp. 48-61, https://www.matjournals.net/engineering/index.php/RRECE/article/view/1714.